The japanese and Manchuria

On september 19th, 1931 Japan launched an attack on Manchuria. Within a few days japanese armed forces had occupied several strategic points in South Manchuria. This was an attempt by the Japanese Empire to gain control over the whole province in order to eventually encompass all of East Asia. The Japanese Government told the army to withdraw from manchuria but that didn't happen. The Chinese Communist party were fighting back along with the Kuomintang however the kuomintang were also fighting their own battle against the Chinese Communist party. The Japanese established a puppet state in Manchuria called Manchukuo, which was run by the previous emperor of China.

Summary

the United States Minister to China reported to Secretary of State Stimson, in a telegram dated September 22, his opinion that this was "an aggressive act by Japan", apparently long-planned, and carefully and systematically put into effect. Lytton commision reported that japan was in fault and japan pulled out of the League of Nations. U.S secretary of State Henry Stimson then brought in the Stimson Doctrine. Mao and the CCP had liberated much of Northern China from the japanese by 1945.